YardStick
The measurement platform whose instrumentation is open
and whose evidence trail is independently verifiable.
Researchers get a lab they can audit, not a vendor they must trust.
Three phases. Full audit trail.
Every study follows the same rigorous pipeline -- from design to independently verifiable results.
Design
Power calculator, pre-registration, primary outcome freeze. Server-enforced -- no post-hoc outcome switching.
Collect
Four outcome pipes: annotation, telemetry, qlm-measure SDK, and CSV upload. Pseudonymous by default.
Verify
Hash-chained records, standalone verifier, deterministic replay. Any third party can audit.
8 Published Studies Recovered
Synthetic data calibrated to published parameters. Every engine recovers the known effect. All data is simulated -- this validates the statistical pipeline, not empirical claims.
Impasse-Driven Tutoring
Process vs. Person Praise
Visible Learning Rankings
ICAP Framework
High-Dosage Tutoring Meta-Analysis
Logistic Regression + AUC
Chi-Square Independence
3-Arm Cluster Randomization
Built for journals, not dashboards.
Every feature exists because a methodologist asked for it.
Pre-Registration
Primary outcome frozen before data collection. Server-enforced -- no post-hoc outcome switching is possible once enrollment begins.
Bonferroni Correction
Secondary outcomes are automatically corrected for multiple comparisons. Exploratory analyses are labeled as such.
Participant-Level Nesting
N = participants, not sessions. Nesting is modeled. Cluster randomization handles classroom-level assignment correctly.
Hash-Chained Records
Every record carries a SHA-256 hash of its predecessor. Tampering breaks the chain. Any auditor can verify independently.
Power Refusal
Designs below 50% power are refused, not blessed. The system will not let you run an underpowered study and call it evidence.
APA Export
One-click publication-ready results with confidence intervals, effect sizes, and CONSORT flow diagrams. Ready for Methods sections.
The Two Clocks
Speed and rigor are not tradeoffs. YardStick delivers both.
Question to pre-registered launch
A study that takes a semester elsewhere takes a week here. Power calculation, protocol design, pre-registration, and enrollment -- all in one session.
First enrollment to first result
Fast AND auditable -- speed a third party can verify. Hash-chained records mean velocity does not come at the cost of trustworthiness.
See it in action.
Real product screenshots -- not mockups.
Start measuring what matters.
YardStick is free for research use.
No dark patterns. Pseudonymous by default.
Primary outcomes freeze before data collection -- by design.